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2009 GMC Yukon Denali Questions

Get answers to questions about your 2009 GMC Yukon Denali at RepairPal. Find solutions, diagnose problems and get back on the road.

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6
questions

What does zero hours mean? Is that why my truck won't start? All fluids are full at the time.was only driven 10 miles per hour .was no warning lights telling me of any problems. Took my truck for regular schegdual maintainance and they power washed my engine and causing electrical problems. So had to keep my truck for two days and tried to fix it.720 481 5694 michelle

No green light on right side of mirror next to emergency button. Unable to figure out which fuse to check so I have checked nearly all of them on the left side of the dash as well as under the hood. Bluetooth phone feature does work but On-star does nothing at all.

Dealer says several hundred to "troubleshoot" before any repairs or anything which I feel is kind of ridiculous.

The front defrost-heat blower fan will not blow air until the car warms up to 180-200 degrees then the blower fan starts blowing air but then continually stops & starts intermittently. However, the rear blower fan does not seem to have a problem. Could it be a sensor or the front fan-blower be the problem?

The front defrost-heat blower fan will not blow air until the car warms up to 180-200 degrees then the blower fan starts blowing air but then continually stops & starts intermittently. However, the rear blower fan does not seem to have a problem. Could it be a sensor or the front fan-blower be the problem?

The electrical problem happens occasionally.Had the alternator replaced, still having problems.Battery is good. Yesterday the problem escalated to lights flickering, power door locks went up and down and I even loss engine acceleration for a brief moment. I keep taking it in and they can't repeat it on demand so mechanics don't know what is wrong. Help!

What is the procedure for headlight replaceement?